wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
I heard that Honda called the shop today. Noone here has heard from him either.
Freestyle project hull
- Thread starter nickwad
- Start date
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
Well I spoke to Kyle at Dasa and was very helpfull! He gave me some good advice ,I have made some adjustments today and its loads better !! Still cannot use the 148 setback pump as have no long shaft yet ....coming soon.
Some more adjustments are needed but its going in the right direction for sure. Thanks Kyle !
Some more adjustments are needed but its going in the right direction for sure. Thanks Kyle !
IceMan
Building a ski in Progress
- Location
- United Arab Emirates
I would like to see a video of how the hull performs with the DASA 1010cc Motor!!!
So would I ! Lol I am waiting for the long drive shaft to come from Maxxx555 , I have only just ordered it due to being let down and ripped off by another supplier.(whose company name and details I would like to publish to warn others against dealing them ! if legality permits)
This surprises and disappoints me as Jet skiing is a sport off enthusiasts who should help each other where possible to promote the sport (Specially here in Thailand !) Not see it as an opportunity to rip off fellow Jet skiers!
I am very keen to try the 148 14vane setback pump!
I will post the results soon.
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Powerhouse
okay
- Location
- Florida
- Location
- Qatar
10/10 on the hull. i always wanted to put my talent into a hull. you did it and should be proud! so is it the nickwad series 
im interested if you would make a nickwad carbon pro series haha
take care,
Hamad
im interested if you would make a nickwad carbon pro series hahatake care,
Hamad
- Location
- Qatar
ps. you should consider re-enforcing before loading that heavy engine on
Hamad
Hamad
Power valve problems
As the photos show I have got power valve problems!
It is a used rebuilt engine by Yukio Honda from Dasa Japan and it has done under 3 hours.
Suspecting a problem I removed the head and found the power valves were damaged and were not attached to the diaphragms.
One shaft is broken and both the threads are stripped.
Also the power valves have been making light contact with the pistons!
The engine is a 10mm stroker 1010cc.
Can anyone tell me if different displacement Dasa engines use different length power valves?
Also does anyone know why the threads would have stripped so quickly?
I live in Thailand so obtaining parts is a problem, are Sea Doo power valves the same ?
As the photos show I have got power valve problems!
It is a used rebuilt engine by Yukio Honda from Dasa Japan and it has done under 3 hours.
Suspecting a problem I removed the head and found the power valves were damaged and were not attached to the diaphragms.
One shaft is broken and both the threads are stripped.
Also the power valves have been making light contact with the pistons!
The engine is a 10mm stroker 1010cc.
Can anyone tell me if different displacement Dasa engines use different length power valves?
Also does anyone know why the threads would have stripped so quickly?
I live in Thailand so obtaining parts is a problem, are Sea Doo power valves the same ?
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SUPERTUNE
Race Gas Rules
- Location
- Clearwater Fl.
Stripped threads and broken shaft are the results of the rave slide hitting the piston/piston rings.
Maybe the engine was a 90mm bore, was rebored during the rebuild to 90.5mm and the valves were not clearanced enough.
I think all the valves are the same and then trim them to suit on each engine.
If you have any problems getting new assemblies, we should have some spare sets for the DASA 10mm engine.
Send email or contact Chad in my signature below.
Maybe the engine was a 90mm bore, was rebored during the rebuild to 90.5mm and the valves were not clearanced enough.
I think all the valves are the same and then trim them to suit on each engine.
If you have any problems getting new assemblies, we should have some spare sets for the DASA 10mm engine.
Send email or contact Chad in my signature below.
Thankyou Supertune .
The cylinder was not rebored , but I think the rave slides were from another engine that was a smaller bore size!
The slides only just contacted the rings I think as there is no visible marks or damage on the piston or rings.
are the slides the same as sea doo stock parts?
How much play should there be between the slide and the slot in the cylinder? and tight clearance should there be between the shaft of the slide and the round hole in the bolt on carrier that the cover clips onto?
Can I get exited about a big power gain when the assemblies are replaced or do the PVs make a small difference?
The cylinder was not rebored , but I think the rave slides were from another engine that was a smaller bore size!
The slides only just contacted the rings I think as there is no visible marks or damage on the piston or rings.
are the slides the same as sea doo stock parts?
How much play should there be between the slide and the slot in the cylinder? and tight clearance should there be between the shaft of the slide and the round hole in the bolt on carrier that the cover clips onto?
Can I get exited about a big power gain when the assemblies are replaced or do the PVs make a small difference?
SUPERTUNE
Race Gas Rules
- Location
- Clearwater Fl.
Nick,
No, Seadoo stock parts will not fit, must use Dasa rave slides.
The Dasa slides in the slots are NOT tight, this is needed for when the power valve slide get heated up from the exhaust temperature there's still plenty of clearance so they don't get sticky.
I don't know how much clearance Dasa put on the shaft hole, I just look for wear on the shafts and make sure you have new billet housings so the bores are not worn out.
When the PV are working correctly yes you will make more power than a non-power cylinder, when the power valve is NOT working correctly, power falls off very badly for the high duration exhaust port, except @ wide open only.
91mm bore with a +10mm stroker (78mm) would come out to a 1014cc engine.
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
Nick,
The valves have to be close enough to the pistons to work the best, but not close enough to hit.
Mr Honda sets up his own engines so I wouldn't know exactly what he does.
Kyle sets them at NO LESS THEN 1MM clearance
Email or call DASA and tell Kyle or Kevin about your problem and we will get a set out to you ASAP. I will tell them about it. Will you be in Havasu for WF?
The valves are all the same length.
Brian
The valves have to be close enough to the pistons to work the best, but not close enough to hit.
Mr Honda sets up his own engines so I wouldn't know exactly what he does.
Kyle sets them at NO LESS THEN 1MM clearance
Email or call DASA and tell Kyle or Kevin about your problem and we will get a set out to you ASAP. I will tell them about it. Will you be in Havasu for WF?
The valves are all the same length.
Brian
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Well ............ and now for the rest of the story . Enquiring minds want to know . Any progress ?
- Location
- Cocoa Beach, FL
any updates?
Polish jet pilot
4aces4aces4aces4aces4aces
- Location
- Warsaw, Poland
updates please - and I've sent you a PM as well ...
Hi everyone, Sorry for the long break It is due to injuring the tendons in my arm ( Long recovery time very boring!)
Having completely striped the motor and with help of Dasa Racing rebuilt it to its correct spec and it is making making awesome power!
Mr Honda had fitted two cylinder base gaskets to lower the compression! But this also changes the port duration slightly and more importantly the squish was way big! I removed one gasket and re-machined the squish to achieve the correct clearance and machined the domes to get just under 200 psi compression.The power valves were faulty which resulted broken stems, very luckily above the stops so the blades did not drop into the cylinders! I got some new valves and caps from Kyle and shaped them to suit the exhaust port roofs and clear the pistons by 1mm. I ended up fitting two small washers between the caps and stems ( OK ed by Kyle) to ensure the valves were making contact with the lower stops at the same time as the diaphragm was bottoming out. After some small carb adjustments the motor is producing the sort of power I was hoping for !
Then I injured my arm so it is in the bedroom now for 6 months ! Followed by a stupid get off from my super motard I am taking it easy for a bit!
I plan to get back on it in a few months. Thank you all for your help and advice. Have a good new year all !
Having completely striped the motor and with help of Dasa Racing rebuilt it to its correct spec and it is making making awesome power!
Mr Honda had fitted two cylinder base gaskets to lower the compression! But this also changes the port duration slightly and more importantly the squish was way big! I removed one gasket and re-machined the squish to achieve the correct clearance and machined the domes to get just under 200 psi compression.The power valves were faulty which resulted broken stems, very luckily above the stops so the blades did not drop into the cylinders! I got some new valves and caps from Kyle and shaped them to suit the exhaust port roofs and clear the pistons by 1mm. I ended up fitting two small washers between the caps and stems ( OK ed by Kyle) to ensure the valves were making contact with the lower stops at the same time as the diaphragm was bottoming out. After some small carb adjustments the motor is producing the sort of power I was hoping for !
Then I injured my arm so it is in the bedroom now for 6 months ! Followed by a stupid get off from my super motard I am taking it easy for a bit!
I plan to get back on it in a few months. Thank you all for your help and advice. Have a good new year all !
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- Location
- Atlanta, Georgia, United States
I can't believe this is the first time I looked at this thread... The only thig that comes to mind is... freaking amazing... and a little bit of jelousy. 8)
